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Table 3 Surgical treatment according to the results of magnetic resonance imaging (MRI)

From: Is the use of preoperative breast MRI predictive of mastectomy?

MRI results n Lumpectomy Ipsilateral mastectomy Bilateral mastectomy
No MRI 817 62% 26% 12%
MRI     
  Normal 259 66% 17%c 16%
  Abnormal     
  Ipsilateral 182 51%c 34%c 15%
  Contralateral 73 53% 21% 26%c
  Both 114 46%c 23% 31%c
MRI biopsya     
  None 132 39%c 35%c 26%c
  Benign 184 66% 21% 13%
  Malignant     
  Ipsilateralb 52 35%c 38%c 27%c
  Contralateral 15 33%c 0c 67%c
  Both 6 0c 0 100%c
  1. aFor those with abnormal MRI.
  2. bIn addition to index lesion.
  3. cP<0.05 compared with the rate for the same surgery with no MRI.